rishabh.anand
Newbie level 3
i'm trying to work a powerline communication. for the TX side, the design has 3 filters...the first two form a 4rth order chebyshev filter and the last one is for current driving in low impedance loads
it consists of a push-pull ckt whose output is fed back to the op-amp to lower the crossover distortion
the output from the first two stages is perfect (6V p-p) but it distorts on the third stage ..pls help
the attached circuit is low on resolution so here are the values
Vpwr =10 V
input resistor=1K ohms
feedback resistance value = 4.02k ohms
load resistance =4.99 ohms
de-coupling capacitor=1 micro farad
the carrier frequency is 133Khz. for narrowband plc
the op-amps used are lmh 6639mf with disable
plus i wanted to tell tht there was complete noise in the output..unlike only crossover distortion of class-B operation.i'm also working on increasing the loop gain so as to rectify the problem...
it consists of a push-pull ckt whose output is fed back to the op-amp to lower the crossover distortion
the output from the first two stages is perfect (6V p-p) but it distorts on the third stage ..pls help
the attached circuit is low on resolution so here are the values
Vpwr =10 V
input resistor=1K ohms
feedback resistance value = 4.02k ohms
load resistance =4.99 ohms
de-coupling capacitor=1 micro farad
the carrier frequency is 133Khz. for narrowband plc
the op-amps used are lmh 6639mf with disable
plus i wanted to tell tht there was complete noise in the output..unlike only crossover distortion of class-B operation.i'm also working on increasing the loop gain so as to rectify the problem...
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